Minecraft on USB?

Over the summer, me and my friends decided to create a realm, and we got pretty far on that world. But once school started everyone stopped playing, and I was pretty disappointed.

However, the admin of the world said that he could give a copy of the world and I could make my own realm so the rest of us that want to play can. I wanted to know if that was even possible thru a USB stick.

Is it possible to transfer the ownership of the Minecraft Realm to someone else? If the first solution doesn’t work then I might try this.